/Engine/Source/Runtime/Engine/Public/SparseVolumeTexture/ISparseVolumeTextureStreamingManager.h
void Request ( [UStreamableSparseVolumeTexture](API\Runtime\Engine\SparseVolumeTexture\UStreamableSparseVolumeTexture) * SparseVolumeTexture, float FrameIndex, int32 MipLevel, bool bBlocking )